JP2015058981A - Mitigation method of heat seal of container opening part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mitigation treatment method of the heat seal of a container opening part to easily open a heat-sealed container.SOLUTION: Heat sealing is performed by previously fastening particles without heat welding property (mitigation particles 13) or a film without heat welding property on a heat sealing surface 12 using a treatment device comprising a container material holding cooling roll, a container material heating part, a particle supply projection part, a projected particle fixing part, a heating part cooling roll and a non-contact optical inspection unit and performing a desired treatment by the start-stop control of the movements of each constitutional part and the whole due to the container material supply amount of the container material holding cooling roll.

Description

Method of relaxing heat sealing of heat-sealed airtight container opening

Containers used for mass production, such as opening with a tool in the opening after sealing by heat sealing, or opening by inducing tearing from the notch provided for opening, both press the container when opening There is a problem with the opening that squirts the package contents and contaminates the container and the opening site.

In general, the opening of a heat-sealed sealed container that does not use equipment is used to induce tearing by giving a notch to the container, but depending on the structure of the container, there is a shape that can not be provided. It is not an effective opening means for all heat seal containers.

Problems to be solved by the invention

For heat-sealed containers used for mass production, opening of the sealed container with a tool or opening by inducing tearing from a notch provided in the opening causes the container contents to blow out the package contents. With the problem of contaminating containers and opening sites. In order to solve this problem, the opening is preliminarily sealed to ease the opening after sealing, and no container or notch is required at the time of opening. In order to prevent contamination, there is a need for a method that relaxes the heat seal of the opening and facilitates the opening.

Means for solving the problem

As a means to solve the problem, a particle having no heat-welding property or a film having no heat-welding property is fixed in advance to the opening heat seal surface of the container material, and this particle or film is interposed in the sealing layer of the opening portion during heat sealing. The method of the present invention is used for the opening pre-treatment for relaxing the heat sealing of the opening and facilitating the opening by sealing.

Effect of the invention

The non-heat-weldable particles or non-heat-weldable film to be fixed to the opening of the container material is fixed in advance to the heat-sealable thermoplastic resin layer previously coated on the container material, and the particles or film are interposed. Depending on the method of performing heat seal sealing, particles or membranes intervening in the heat seal sealing layer facilitate opening of the container. A desired heat seal relaxation can be achieved by selecting the particle or film material, the particle size, the heat seal strength of the relaxation portion, and the like, and a container having good openability can be provided.

Figure of cross section of heat seal with interstitial relaxation particles

Diagram showing the outline of the present invention

An embodiment of the present invention will be described with reference to FIG.
In FIG. 2, 21 is a container material. The container material is supplied at a predetermined speed from the winding state coated with the thermoplastic resin to the apparatus shown in FIG. Reference numeral 23 denotes a heating unit burner, which is controlled by the supply of the heating unit container material during the required heating of the heat seal mitigating unit, and moves and rotates to a predetermined position to heat the required heat seal mitigating unit to form a heat seal resin layer. It is a heating section that melts and moves and rotates back to a retreat position that avoids unnecessary heating after the required heating. 24 is a heat seal mitigating particle projection unit with a built-in projection nozzle, and particles having no heat-weldability conveyed by air preheated in the vicinity of the heat seal temperature are placed on the surface of the 21 container material heated by the 23 heating unit. The projection time is controlled by the supply amount of the 21 container material. Reference numeral 25 denotes a brush which is disposed inside the 24 heat seal relaxation particle projection chamber and removes excess particles. 26 is a cooling roll, and the 26 cooling roll is also provided immediately after passing the 25 brush in the interior of the 24 particle projection chamber and immediately after passing through the 24 particle projection chamber to fix the particles by fixing the particles and cooling the heating unit. . The pressure inside the 24-particle projection chamber is maintained to be more negative than the atmospheric pressure of the pretreatment device installation environment of the present invention so as to prevent the particles from scattering outside the particle projection chamber. Reference numeral 22 denotes a material holding cooling roll, which maintains a constant distance between the container material and the pretreatment device of the present invention in the section from the 23 heating unit to the 26 cooling roll, and prevents a temperature rise on the opposite surface of the container material due to heating. A material holding cooling roll. Reference numeral 29 denotes a non-contact optical inspection machine. After the particle projection fixation is completed, the 29 non-contact optical inspection machine is arranged at a predetermined position to confirm the fixation of the particles. Stop the entire pretreatment device and mark the alarm and container material. This container pretreatment apparatus is an embodiment of the method of the present invention, and fixes particles having no heat-welding property or a film having no heat-welding property to an opening of a material of a heat-sealed container coated with a thermoplastic resin, By carrying out heat seal sealing with these particles or film interposed therebetween, the desired heat seal relaxation was achieved and the openability was improved.

The method of the present invention, in which particles or a film is fixed to the opening of a material of a heat seal container pre-coated with a thermoplastic resin and the heat seal is sealed through the particles or film, the method of selecting the material and particle size of the particles or film The desired heat-sealing relaxation can be achieved by the strength of the sealing heat-sealing of the required relaxation portion, etc., and a container with good openability can be provided.

Reference numeral 10 denotes a base material for the container material.
11 is a resin coating.
Reference numeral 12 denotes a heat seal surface.
Reference numeral 13 denotes relaxation particles interposed on the seal surface.
21 is a container material.
Reference numeral 22 denotes a container material holding cooling roll.
Reference numeral 23 denotes a heating section burner.
Reference numeral 24 denotes a projection chamber.
Reference numeral 25 denotes a brush.
This is a 26 pressure constant cooling roll.
Reference numeral 27 denotes a carrier air heater.
Reference numeral 28 denotes a relaxed particle capturing / recovery supply device.
Reference numeral 29 denotes an optical inspection machine.

Claims (1)

The required heat seal mitigation part is made by fixing non-heat-weldable particles or non-heat-weldable film to the heat-seal mitigation part of the container material coated with thermoplastic resin, and sealing with this particle or film interposed. To apply to the container.

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